Until I Marry Tsuna, the Sweet-and-Black-Haired Crossover

Rio is an ordinary housewife with a meek, overworked husband, but she believes that one day he will regain his former glory.

Tsuna is an ordinary mafia boss who, to keep up the act of being a pathetic office worker, is forced to put on a show with his Guardians in front of his wife every day.

Hayato Gokudera, a heartless boss; Mukuro Rokudo, who has designs on her husband's body; Osamu Dazai, who wants to ruin her husband's company and cut off her source of income... Rio can't understand why everyone around her husband is such a scumbag.

One day, she discovers that her husband has finally regained his former glory.

Rio smiles brightly. "Darling, can you explain why you can blast a ten-meter-wide crater with one hand?"

Sawada Tsunayoshi smiles just as warmly, refusing to be outdone. "Before that, can you explain what happened to Mr. Dazai, whom you knocked out with a single punch?"

Theme: The love story of a bickering couple.